In the property page, go to Options > Midterm rates
Complete the form by selecting the time interval you want the midterm rate to be applied and the price per night, then click on submit.
N.B.: Changes to mid-term prices may take up to 1 hour to appear on the calendar and on platforms.
Once the midterm rate is validated, it will be shown in the property's calendar page under the regular daily rate.
N.B.: the price markup will always be applied on top of the rate shown in the calendar.